SBI IRCTC CC gives either 4% or 10% cashback on train ticket bookings. For all other spends, it gives 1 reward point (worth ₹1) for each ₹125.
You can use this card for sale specific offers (10% off) on Amazon and Flipkart. Also, you will get a Flipkart voucher worth 5% of Flipkart spends done through Yono + IRCTC SBI CC.
But apart from this, the card doesn't give 5% cashback on Amazon or Flipkart.
If you badly want some other SBI card, then try to get Elite.